manga-ka (mon-ga-ka)
- author/artist of Japanese comic books
oni (oh-nee)
- an ogre; not to be confused with the translation of a devil
oni-kui (oh-nee-kwee)
- a creature that eats ogres; Sugino frequently refers to Haruka as such, meaning "ogre-eater"
tengu (ten-goo)
- a goblin; legendary winged creatures of power
yokai (yo-kai)
- meaning demons or monsters; in the case of Tactics, more so monsters and spirits than the demonic
youkai (yo-kai)
- see yokai (simply a different spelling)